Set the maxConcurrency config default value to 0 ("unlimited"). Also updated a little code
so that a maxConcurrency config value of 0 or less will result in "unlimited", i.e. process
the whole array of globbed files at once.

1.1.0: Published to NPM on 2013-05-31.

Added the maxConcurrency config options to throttle how many files can be processed
simultaneously. This helps avoid issues across the board as most systems have an implicit
number of file handles that can be opened as once. It also provides those running on
hardware with limited resources to maintain better control of consumption.

Under the covers: swapped in the async module to replace q, particularly for its
parallelLimit function.

1.0.2: Published to NPM on 2013-05-25.

Now omitting directories from the glob results as trying to convert their non-existent line
endings throws errors.